# defender-security/3.1.0/src/component/security-tweaks/prevent-enum-users.php Defender Security – Malware Scanner, Login Security & Firewall, version 3.1.0. 253 lines. - Page: https://pluginprobe.com/plugins/defender-security/3.1.0/code/src/component/security-tweaks/prevent-enum-users.php - Raw: https://pluginprobe.com/plugins/defender-security/3.1.0/raw/src/component/security-tweaks/prevent-enum-users.php - Modified: 2022-01-24T10:27:02+00:00 Line numbers below start at 1. Link to a line or a range by appending a fragment to the page URL, for example `https://pluginprobe.com/plugins/defender-security/3.1.0/code/src/component/security-tweaks/prevent-enum-users.php#L10-L20`. ```php resolved; } /** * Here is the code for processing, if the return is true, we add it to resolve list, WP_Error if any error. * * @return bool */ public function process() { return true; } /** * This is for un-do stuff that has been done in @process. * * @return bool */ public function revert() { return true; } /** * Shield up. * * @return void */ public function shield_up() { $this->resolved = true; if ( is_admin() || ( defined( 'WP_CLI' ) && WP_CLI ) ) { return; } add_filter( 'oembed_response_data', array( $this, 'oembed_author_filter' ), 99, 4 ); add_filter( 'wp_sitemaps_users_pre_url_list', array( $this, 'block_user_url_sitemap' ), 99, 0 ); add_filter( 'wp_sitemaps_add_provider', array( $this, 'block_user_provider_sitemap' ), 99, 2 ); add_filter( 'rest_authentication_errors', array( $this, 'block_rest_api_user_endpoint' ) ); if ( empty( $_SERVER['QUERY_STRING'] ) ) { return; } $this->maybe_block( $_SERVER['QUERY_STRING'] ); add_filter( 'redirect_canonical', array( $this, 'maybe_block' ) ); } /** * Maybe block the request if it's trying to access the author page with query param. * * @param string $request * * @return string */ public function maybe_block( $request ) { if ( ! current_user_can( 'edit_others_posts' ) ) { $message = __( 'Sorry, you are not allowed to access this page', 'wpdef' ); $title = __( 'Forbidden', 'wpdef' ); $status_code = 403; $pattern = '/author=([0-9]*)|\?author=([0-9]*)(\/*)/i'; if ( preg_match( $pattern, $request ) ) { wp_die( $message, $title, $status_code ); } } return $request; } /** * Return a summary data of this tweak. * * @return array */ public function to_array() { return [ 'slug' => $this->slug, 'title' => __( 'Prevent user enumeration', 'wpdef' ), 'errorReason' => __( 'User enumeration is currently allowed.', 'wpdef' ), 'successReason' => __( 'User enumeration is currently blocked, nice work!', 'wpdef' ), 'misc' => [], 'bulk_description' => __( 'To brute force your login, hackers and bots can simply type the query string ?author=1, ?author=2 and so on, which will redirect the page to /author/username/ - bam, the bot now has your usernames to begin brute force attacks with. We can add a .htaccess file to your site to prevent the redirection.', 'wpdef' ), 'bulk_title' => __( 'Prevent user enumeration', 'wpdef' ) ]; } /** * Getter method of enabled_user_enums. * * @return array Return array of enabled enumeration options. */ public function get_enabled_user_enums() { $enabled_user_enums = $this->get_option( 'enabled_user_enums' ); $this->enabled_user_enums = is_null( $enabled_user_enums ) ? array() : (array) $enabled_user_enums; return $this->enabled_user_enums; } /** * Setter method of enabled_user_enums. * * @param array $value Array of enabled user enumeration options. * * @return bool Return true if value updated, otherwise false. */ public function set_enabled_user_enums( $value ) { $this->enabled_user_enums = (array) $value; return $this->update_option( 'enabled_user_enums', $this->enabled_user_enums ); } /** * Filters the author detail from oEmbed response data. * * @param array $data The response data. * @param WP_Post $post The post object. * @param int $width The requested width. * @param int $height The calculated height. * * @return array $data The response data. */ public function oembed_author_filter( $data, $post, $width, $height ) { if ( in_array( 'enum-oembed', $this->get_enabled_user_enums(), true ) ) { unset( $data['author_name'] ); unset( $data['author_url'] ); } return $data; } /** * Blocks user url generation in sitemap. * * Consider the URL: http://example.com/wp-sitemap-users-1.xml will not return user URL XML. * * @return bool|null If option sitemap enumeration enabled then return false else null/void will return. */ public function block_user_url_sitemap() { if ( in_array( 'enum-sitemap', $this->get_enabled_user_enums(), true ) ) { return false; } } /** * Blocks the user provider sitemap before it is added from wp-sitemap.xml. * * @param WP_Sitemaps_Provider $provider Instance of a WP_Sitemaps_Provider. * @param string $name Name of the sitemap provider. * * @return bool|WP_Sitemaps_Provider If option sitemap enumeration enabled then return false else WP_Sitemaps_Provider instance. */ public function block_user_provider_sitemap( $provider, $name ) { if ( in_array( 'enum-sitemap', $this->get_enabled_user_enums(), true ) && 'users' === $name ) { return false; } return $provider; } /** * Block user REST API endpoint for not logged-in access. * * @param WP_Error|null|true $errors WP_Error if authentication error, null if authentication * method wasn't used, true if authentication succeeded. * * @return WP_Error|null|true $errors WP_Error if authentication error, null if authentication * method wasn't used, true if authentication succeeded. */ public function block_rest_api_user_endpoint( $errors ) { $request_uri = filter_input( INPUT_SERVER, 'REQUEST_URI', FILTER_SANITIZE_URL ); $rest_route = filter_input( INPUT_GET, 'rest_route', FILTER_SANITIZE_URL ); $is_url_match = preg_match( '/users/i', $request_uri ) !== 0 || preg_match( '/users/i', $rest_route ) !== 0; if ( in_array( 'enum-rest', $this->get_enabled_user_enums(), true ) && $is_url_match && ! is_user_logged_in() ) { return new \WP_Error( 'rest_cannot_access', esc_html__( 'Only logged-in users can access the User endpoint REST API.', 'wpdef' ), array( 'status' => rest_authorization_required_code() ) ); } return $errors; } } ```